What's the Kennection? #380

What kind of football scoring play has a one-point variant so rare that it’s never happened in the NFL?

Ice-covered Ceres, discovered in 1801, is the largest what in the solar system?

What Eastern European beet soup is often served with a dollop of sour cream called 'smetana'?

Which of the seven Christian virtues did Sonny Bono and Cher use as the name of their only child together?

Which martial art was added to the Olympics at the 1964 Tokyo games?

What's the "Kennection"?